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The U6 small nuclear RNA gene family of potato

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Abstract

Using the inverse polymerase chain reaction (IPCR), 19 U6snRNA gene promoters were isolated from the potato genome. Analysis of their nucleotide sequences revealed the existence of two subfamilies. Promoters from class 1 harbour the typical sequence elements required for plant snRNA gene transcription whereas those from class 2 do not have a TATA box. Three promoters were fused to a modified U6snRNA-coding sequence to allow their acitivity to be monitored in tobacco protoplasts. Two of the promoters, one from either class, were found to be active. Comparison of potato U6snRNA gene promoter sequences with those found in other plant species showed various degrees of homology. In addition, the entire nucleotide sequences of seven potato U6snRNA genes and one pseudogene were determined. The overall frequency of nucleotide changes after PCR was found to be 1.15×10-3. The mutations appeared to be clustered in a distinct area and were all A-to-G/T-to-C substitutions.

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Author notes

  1. F. Guerineau

    Present address: Department of Botany, University of Leicester, University Road, LE1 7RH, Leicester, UK

Authors and Affiliations

  1. Scottish Crop Research Institute, Invergowrie, DD2 5DA, Dundee, UK

    F. Guerineau & R. Waugh

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  1. F. Guerineau
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  2. R. Waugh
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Guerineau, F., Waugh, R. The U6 small nuclear RNA gene family of potato. Plant Mol Biol 22, 807–818 (1993). https://doi.org/10.1007/BF00027367

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  • DOI: https://doi.org/10.1007/BF00027367

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